1244210081 has 2 divisors, whose sum is σ = 1244210082. Its totient is φ = 1244210080.

The previous prime is 1244210057. The next prime is 1244210083. The reversal of 1244210081 is 1800124421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 639837025 + 604373056 = 25295^2 + 24584^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1244210081 is a prime.

It is a super-2 number, since 2×1244210081² = 3096117451324053122, which contains 22 as substring.

Together with 1244210083, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1244210083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622105040 + 622105041.

It is an arithmetic number, because the mean of its divisors is an integer number (622105041).

Almost surely, 2^1244210081 is an apocalyptic number.

It is an amenable number.

1244210081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244210081 is an equidigital number, since it uses as much as digits as its factorization.

1244210081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 1244210081 is about 35273.3622015254. The cubic root of 1244210081 is about 1075.5515701292.

The spelling of 1244210081 in words is "one billion, two hundred forty-four million, two hundred ten thousand, eighty-one".